Thermodynamic Performance of a Double-Effect Absorption Refrigeration Cycle Based on a Ternary Working Pair: Lithium Bromide + Ionic Liquids + Water

Yiqun Li, Na Li, Chunhuan Luo and Qingquan Su
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Yiqun Li: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Na Li: State Grid Energy Conservation Service CO., Ltd., Beijing 100052, China
Chunhuan Luo: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Qingquan Su: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

Energies, 2019, vol. 12, issue 21, 1-21

Abstract: For an absorption cycle, a ternary working pair LiBr–[BMIM]Cl(2.5:1)/H 2 O was proposed as a new working pair to replace LiBr/H 2 O. The thermodynamic properties including specific heat capacity, specific enthalpy, density, and viscosity were systematically measured and fitted by the least-squares method. The thermodynamic performance of a double-effect absorption refrigeration cycle based on LiBr–[BMIM]Cl(2.5:1)/H 2 O was investigated under different refrigeration temperatures from 5 °C to 12 °C. Results showed that the ternary working pair LiBr–[BMIM]Cl(2.5:1)/H 2 O had advantages in the operating temperature range and corrosivity. Compared with LiBr/H 2 O, the operating temperature range was 20 °C larger, and the corrosion rates of carbon steel and copper were reduced by more than 50% at 453.15 K. However, the double-effect absorption refrigeration cycle with LiBr–[BMIM]Cl(2.5:1)/H 2 O achieved a coefficient of performance ( COPc ) from 1.09 to 1.46 and an exergetic coefficient of performance ( ECOPc ) from 0.244 to 0.238, which were smaller than those based on LiBr/H 2 O due to the higher generation temperature and larger flow ratio.

Keywords: Double-effect absorption refrigeration; ionic liquids; working pair; thermodynamic properties; thermodynamic performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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